E30 Fuel Problem

[TobyB]

I bet you have a fuel cell in your trunk.

More than one new race car owner has tried to fill his/her car through the filler and discovered that the stock tank was missing.

That, or the pixie dust and unicorn farts.

OR the PO filled up and didn't reset the odometer.

t

[Idrisu]

The cylinder is the pump motor. The filter is the white "sock" that sticks out like an L. It is the inlet for fuel. It basically sits at the bottom of the tank in a splash cup and is where fuel enters the pump. If it becomes clogged the fuel pump will burn out because the gasoline acts as a lubricant for the pump motor and mechanism.

That's why I suggested you take the pump out and look at the filter. If its covered in sediment and the filter is clogged then the pump will burn out. Once you look in the tank with a light you should be able to see what the inside of the tank looks like. If there is a lot of rust, then a new pump won't last very long as there is a good chance the filter will clog up and the motor will burn out.

Do you have a Bentley Manual? There is a whole section on testing fuel delivery. You should go through it before replacing the old fuel pump to establish a baseline measurement. See if the old pump has below average fuel delivery, look at the color of the fuel, rule out some variables before you blindly replace parts and try to understand what is going on with the car with actual data.




Rusty Tank:


Look at post #375
http://www.r3vlimited.com/board/show...191125&page=25

Okay so I went to look at it again and it looks like there isn't any rust in the tank and the gas looks clean.



Heres what the fuel pump looks like.




What do you think about the wiring?





Also the fuel pump filter did not look clogged at all.